You have been advised to check your pulse during exercise in order to monitor your heart rate. What is happening in your heart as your pulse is produced?
A) ventricular diastole
B) atrial diastole
C) the aortic valve and pulmonary valves are closing
D) ventricular systole
E) atrial systole
D
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What causes antigenic drift to occur?
A. introduction of new genes from other viruses B. gradual changes in the amino acid sequence of viral proteins C. gradual changes in the viral genome due to replication errors D. gradual changes in both the amino acid sequence of viral proteins and the viral genome due to replication errors
Consider this statement: Information about citizens' genomes should be held in a centralized database by a single private company or by the government. Do you agree or disagree? Explain your reasoning
What will be an ideal response?
What selective pressures are likely to have led to the evolution of regulatory systems like operons? Why not simply express these genes continuously?
What will be an ideal response?
What are transgenic organisms? Explain the rationale behind using these organisms to produce some
of the proteins needed for human use, instead of relying solely on proteins produced by genetically engineered E. coli What will be an ideal response?